/*
 * Copyright (C) 2008-2010 Martin Riesz <riesz.martin at gmail.com>
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.pneditor.editor.commands;

import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.pneditor.petrinet.Transition;
import org.pneditor.petrinet.Role;
import org.pneditor.util.Command;

/**
 * 
 * @author Martin Riesz <riesz.martin at gmail.com>
 */
public class RemoveTransitionsFromRolesCommand implements Command
{

	private Set<Transition> transitions;
	private List<Role> roles;
	private Map<Role, Set<Transition>> oldRoleTransitions;

	public RemoveTransitionsFromRolesCommand(Set<Transition> transitions,
			List<Role> roles)
	{
		this.transitions = transitions;
		this.roles = roles;
	}

	public void execute()
	{
		oldRoleTransitions = new HashMap<Role, Set<Transition>>();
		for (Role role : roles)
		{
			oldRoleTransitions.put(role, new HashSet<Transition>(
					role.transitions));
		}
		redo();
	}

	public void undo()
	{
		for (Role role : roles)
		{
			role.transitions.clear();
			role.transitions.addAll(oldRoleTransitions.get(role));
		}
	}

	public void redo()
	{
		for (Role role : roles)
		{
			role.transitions.removeAll(transitions);
		}
	}

	@Override
	public String toString()
	{
		return "Remove transition from role(s)";
	}

}
